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WO2021245689A3 - A point-of-care (poc) amperometric device for selective arsenic sensing - Google Patents

A point-of-care (poc) amperometric device for selective arsenic sensing Download PDF

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Publication number
WO2021245689A3
WO2021245689A3 PCT/IN2021/050496 IN2021050496W WO2021245689A3 WO 2021245689 A3 WO2021245689 A3 WO 2021245689A3 IN 2021050496 W IN2021050496 W IN 2021050496W WO 2021245689 A3 WO2021245689 A3 WO 2021245689A3
Authority
WO
WIPO (PCT)
Prior art keywords
sensing
selective
ergo
field water
poc
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/IN2021/050496
Other languages
French (fr)
Other versions
WO2021245689A2 (en
Inventor
Thalappil Pradeep
Sourav KANTI JANA
Kamalesh Chaudhari
Md Rabiul Islam
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Indian Institute of Technology Madras
Original Assignee
Indian Institute of Technology Madras
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Indian Institute of Technology Madras filed Critical Indian Institute of Technology Madras
Priority to US18/008,165 priority Critical patent/US20230273151A1/en
Publication of WO2021245689A2 publication Critical patent/WO2021245689A2/en
Publication of WO2021245689A3 publication Critical patent/WO2021245689A3/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/4161—Systems measuring the voltage and using a constant current supply, e.g. chronopotentiometry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/28—Electrolytic cell components
    • G01N27/30—Electrodes, e.g. test electrodes; Half-cells
    • G01N27/308—Electrodes, e.g. test electrodes; Half-cells at least partially made of carbon
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/28—Electrolytic cell components
    • G01N27/30—Electrodes, e.g. test electrodes; Half-cells
    • G01N27/307—Disposable laminated or multilayered electrodes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G01N33/1813—Specific cations in water, e.g. heavy metals

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Pathology (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Physics & Mathematics (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Molecular Biology (AREA)
  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

The present invention relates to a new device for selective arsenic sensing usingelectrochemically reduced graphene oxide (ERGO) based reusable flexible electrode strip.Active electrode of the device was prepared by a very simple method in which the thin film ofgraphene oxide (GO) was reduced electrochemically at a low DC potential (0 to -1.5 V). Thesaid device selectively detects As3+ in field water sample within a wide range of concentrationswith a limit of detection of less than 25 ppb. More importantly, the selectivity of the electrode isindependent of conductivity and TDS levels of measured field water samples which werecollected from various parts of India. Selective detection of As3+ by ERGO was controlled byoptimizing the surface electronic conductivity through structural modification of it duringelectroreduction process.
PCT/IN2021/050496 2020-06-05 2021-05-21 A point-of-care (poc) amperometric device for selective arsenic Ceased WO2021245689A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US18/008,165 US20230273151A1 (en) 2020-06-05 2021-05-21 A point-of-care (poc) amperometric device for selective arsenic sensing

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN202041023576 2020-06-05
IN202041023576 2020-06-05

Publications (2)

Publication Number Publication Date
WO2021245689A2 WO2021245689A2 (en) 2021-12-09
WO2021245689A3 true WO2021245689A3 (en) 2022-01-13

Family

ID=78831728

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IN2021/050496 Ceased WO2021245689A2 (en) 2020-06-05 2021-05-21 A point-of-care (poc) amperometric device for selective arsenic

Country Status (2)

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US (1) US20230273151A1 (en)
WO (1) WO2021245689A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114720438A (en) * 2022-03-08 2022-07-08 浙江警官职业学院 Method for detecting arsenic in water and preparation method of detection material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170363572A1 (en) * 2014-12-03 2017-12-21 Uwm Research Foundation, Inc. Contaminant detection device and method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20170363572A1 (en) * 2014-12-03 2017-12-21 Uwm Research Foundation, Inc. Contaminant detection device and method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FURUE, RYO ET AL.: "Arsine gas sensor based on gold-modified reduced graphene oxide", SENSORS AND ACTUATORS B: CHEMICAL, vol. 240, no. 2017, 24 August 2016 (2016-08-24), pages 657 - 663, XP029818972, DOI: 10.1016/j.snb.2016.08.131 *

Also Published As

Publication number Publication date
US20230273151A1 (en) 2023-08-31
WO2021245689A2 (en) 2021-12-09

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